Valve action for explosive engines



E. S. CAMERON.

VALVE ACTION FOR EXPLOSIVE ENGINES.

APPLICATION FILED JUNE I8, 1920.

Patented Jan. 3, 11.922.

4 SHEETS-SHEET I.

E. S. CAMERON.

VALVE ACTION FOR EXPLOSIVE ENGINES.

APPLICATION FILED JUNE l8, I920.

1 02,47 Patented Jan. 3, 1922a 4 $HEETS-SHEET 2.

E. S. CAMERON.

VALVE ACTION FOB EXPLOSIVE ENGINES. APPLICATION FILED JUNE 18, 1920.

1,409,47 Patented Jan. 3,1922,

4 SHEETS-SHEET 3.

mwzms,

E. S. CAMERON.

VALVE ACTION FOR EXPLOSIVE ENGINES.

APPLICATION FILED JUNE I8. I920.

Patented Jan. 3, 1922 4 SHEETS-SHEET 4.

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EVERETT s. con, or WEST HA EN, oommcrrcur.

VAL E .ecrron FOR EXPLOSIVE ENGINES.

To all'whomz'tmay coacem:

v by declare the following, when taken in con- Be it. known that I, EVERET S. CAMERON,

a citizen of the- West Haven, in the county. of New Haven and State of Connecticut, have invented a --new and useful Improvementin Valve Actions for Explosive Engines; and I do herenection with the accompanying drawings and the characters of reference marked thereon, to be a full, clear, and exact description of the sam'e,'and which-said drawings constitute part of this application, and represent,- in- 1, a view partly in front elevation and partly in. vertical transverse section-of one form which an explosive engine embodying my'improved valve-action,;may assume.

Fig. 2, a broken viewpartly "in side elef .vation' and partly in vertical sectlonlof a two-cylinder unit embodying my invention.

- Fig. 3, a detached view in elevation of one of my improved valve-operating shafts.

Fig. 4, aplan view thereof. Fig. v5, a reverse plan view thereof.

Fig. 6, a detached view in side elevation .of one of the rocker-shaft bearing-sleeves." Fig. 7,5 plan view thereof;

Fig. 8, a detached plan-view-on the full scale, of one of the double, valve-operating rocker-arms.

. 3 Fig. 9; a viewthereof in front elevation.

Y the parts operated by it will be amply lubri-.

cated by the oil within'the crank-case, the object'being to roduce a simple, compact,

and durable vave-action constructed with. partlcular reference to convenlence of access and adjustment and effectiveness ofoperation. a

With these ends in view, my invention consists in a valve-action for explosive engines, having certain details of construction as will hereinafter described and pointed out in the claims.

- In carrying out my n ention, as herein Specification of Letters Patent.

I Application filed June s, 1920. Serial no. 389,900.

valve-operating rocker-shafts 2 United States, residing at inthe case.

"sleeves, each is. its length with half 7 of the crankcase,

Patented Jan. 3, 1922.

shown, I employ two, vertically arranged,

and "3., the former-operating the twoinlet-valves 4 of a two-cylinder explosive engine, and the latter operating the two exhaust-valves 5 thereof. The said shafts are mounted in long,

vertically arranged, rocker-shaft bearingsleeves 6 from the upper and lower ends of which the squared upper and lower ends of the shafts project, these long sleeves being set into and supported by the upper face of the upper half 7 of the crank-case, the re.- movable'lower half 8 of which is filled with oil which is splashed about as the engine opcrates. Under this construction, about onehalf of the length of each sleeve is exposed above the crank-case, while about one-half of the length'of each sleeve is housed with For so mounting the respective bearingprovided about-midway of a suspension-flange 9 arranged at a right angle to its axis and adapted to rest directly upon the top of the upperv each of these flanges being-inwardly extended toform a fastening-lug 10 receiving a bolt 11 by means of i which the flange and hence the sleeve is 'solidly fastened to the "case. As shown, the

upper ends oflthe sleeves are reinforced by:

tapering radial webs 12 merging at their lower ends into the upper. faces of the horizontal suspension' flanges "9. The lower ends of the sleeves are enlarged to form wide aligning-bearings 13 which, whenthe sleeves are. in" place, passjdownward throughinte gra'l, loop-like bearings 14 cast wlthin the lower edge of the upper half -7 of the case. The lower portions of the said sleeves, by

which I mean those portions thereof housed within the crank-case, are. formed wltha vertical ran e of oil-ffeed-holes 15 through which the 011 is admitted from the crankcase to the rocker-shafts 2 and 3, each of which, as shown, is formed throughout its.-

length with a spiral oil-distributing groove 16, whereby they are thoroughly lubricated throughout their entire length, the oil using through the said grooves by caplllary action.

- The shafts 2 and 3"are suspended from their upper ends in the sleeves 6 by means of collars 17 secured in place by pins 18 and resting upon the upperedges of sleeves, on

' which they turn and by wh1ch the shafts are ly pp r e While the sleeves inturn place by screws 22 and alternately engaging with the outer ends of the valve-stems 23 of the intake-and exhaust-valves land .5, which maybe of any approved construction and arrangement. As shown, these .valves are located in cages 24 and 25 and are held in their closed positions by springs 26 in the usual manner. The inlet-valves 4 of the cylinders 27 are alternately operated, as are also the exhaust valves 5 of the same cylinders," due to the rocking of the valve- 7 shafts which are timed to operate in accordance with the operations of the pistons 28 of the said cylinders, as usual in engines of this type.

The squared, projecting, lower ends of the .shafts 2 are provided with removable camarms 29, the split sleeves 30 whereof having squared openings 31. The projecting inner ends of these arms mountrollers 32 which co-act with cams 33 (Fig. 11) mounted upon the cam-shaft 34, which is located directly below the crank-shaft 35, as clearly shown in Fig. ,1, the two-part bearings 36 of the cam-shaft 34 beingentirely supported from the upper half 7 of the crank-case so that the lower part 8 of the crank-case may be removed and replaced without 'disturbing the cam-shaft. As shown, the camshaft bearings 36 are suspended by studs 37 passing upward into the upper half 38 of thetwo-part maimbearings of the crankshaft 35. I do not, however, limit myself to any one way of suspending the bearings of the cam -shaft from the upper half 7 of the crank case.

As shown, theoam-shaft 34 is provided at" its rear end with a standard, oil-circulating gear-pump 39 by means of which the oil is taken from the bottom of the crank-case and forced into the oil-distributing tube 40 from which it is fed into the dip pans 41, from which it is distributed to all parts of the engine in the usual manner of such engines.

By arranging the rocker-shafts in the vertical plane, they are arranged at right angles with respect to the valve-stems, wherebythe fr1ct1on of the operation of the valves is reduced to the minimum. By suspending the rocker-shafts from their upper ends and susq pending their bearing-sleeves in'the top of the crankcase, I'avoid the necessity. of prq', x

1. A valve-action for explosive engines,

having a two-part crank-case the lower part of whlch is removable, a crank-shaft located therein, a cam-shaft located therein below the crank-shaft, means for supporting the cam-shaft from the upper part of the crankcase, a rocker-shaft, means connecting the upper end of the said shaft with the intakeand exhaust-valves of the engine, and means connecting the lower end of the rocker shaft with the cam-shaft, whereby the lower half of the crank-case may be removed and replaced without disturbing the cam-shaft or the rocker-shaft.

2. A valve-action for explosive engines, having a two-part crank-case the lower part of which is removable, a crank-shaft located therein, a cam-shaft located below thecrankshaft, means of supporting the cam-shaft from the upper part of the crank-case, and a cam-operated valve-operating rocker-shaft mounted in the upper half of the crank-case, whereby the lower part of the crank-case ma be removed and replaced without distur ing the cam-shaft or the rocker-shaft.

3. A valve-action for explosive engines, having a two-part crank-case of which the lower part is removable, a crank-shaft therein a cam-shaft located below the crank? independently of the lowerpart of the into, a rocker-shaft suspended from the upper end of the said sleeve, connection beshaft, means forsupporting the cam-shaft tween the projecting upper end of the shaft v and the intake and exhaust-valves of the engine, and a removable cam-arm mounted upon the projecting lower 'end .of the shaft and co-acting withthe cam-shaft, whereby the lower part of the crank-case maybe removed without disturbing the rocker-shaft and its connections.

In testimony whereof, I hav signed this specification in the ing witnesses.

I EVERETT S. CAMERON. Witnesses .J. HAROLD FLYNN,

Gnome DUDLEY Snizmoun,

presence of two subscrib- 

